- TOTAL PET is a new course for the Cambridge ESOL PET B1 Threshold of the CEFR.TOTAL PET can be used alongside a general language course or on its own for intensive exam preparation with up to 50 hours material.TOTAL PET covers the word list of vocabulary that could appear in the PET exam. It encourages students to practise lexis appropriate to their personal requirements, e.g. nationality, hobbies, likes and dislikes.